and many more benefits!

Find us on Facebook

GMAT Club Timer Informer

Hi GMATClubber!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Hide Tags

Two mechanics were working on your car. One can complete the [#permalink]

Show Tags

23 Nov 2012, 04:04

3

This post receivedKUDOS

1

This post wasBOOKMARKED

00:00

A

B

C

D

E

Difficulty:

5% (low)

Question Stats:

84%(02:37) correct
16%(01:45) wrong based on 107 sessions

HideShow timer Statistics

Two mechanics were working on your car. One can complete the given job in six hours, but the new guy takes eight hours. They worked together for the first two hours, but then the first guy left to help another mechanic on a different job. How long will it take the new guy to finish your car?

Show Tags

Two mechanics were working on your car. One can complete the given job in six hours, but the new guy takes eight hours. They worked together for the first two hours, but then the first guy left to help another mechanic on a different job. How long will it take the new guy to finish your car?

A. 7/4B. 4/3C. 15/4D. 10/3E. 17/5

Given that the rate of one mechanic is 1/6 job/hour and the rate of another is 1/8 job/hour.

In 2 hours that they work together they complete 2(1/6+1/8)=7/12 of the job and 5/12 part of the job is left to be done.

The second mechanic to complete 5/12 of the job will need time=job/rate=(5/12)/(1/8)=10/3 hours.

Re: Two mechanics were working on your car. One can complete the [#permalink]

Show Tags

15 Nov 2014, 07:03

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Re: Two mechanics were working on your car. One can complete the [#permalink]

Show Tags

02 May 2016, 05:43

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________